# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import unittest
from nose.plugins.attrib import attr
from heat.engine.dependencies import Dependencies
from heat.engine.dependencies import CircularDependencyException
@attr(tag=['unit', 'dependencies'])
@attr(speed='fast')
[docs]class dependenciesTest(unittest.TestCase):
def _dep_test(self, func, checkorder, deps):
nodes = set.union(*[set(e) for e in deps])
d = Dependencies(deps)
order = list(func(d))
for n in nodes:
self.assertTrue(n in order, '"%s" is not in the sequence' % n)
self.assertEqual(order.count(n), 1)
self.assertEqual(len(order), len(nodes))
for l, f in deps:
checkorder(order.index(f), order.index(l))
def _dep_test_fwd(self, *deps):
def assertLess(a, b):
self.assertTrue(a < b,
'"%s" is not less than "%s"' % (str(a), str(b)))
self._dep_test(iter, assertLess, deps)
def _dep_test_rev(self, *deps):
def assertGreater(a, b):
self.assertTrue(a > b,
'"%s" is not greater than "%s"' % (str(a), str(b)))
self._dep_test(reversed, assertGreater, deps)
[docs] def test_single_node(self):
d = Dependencies([('only', None)])
l = list(iter(d))
self.assertEqual(len(l), 1)
self.assertEqual(l[0], 'only')
[docs] def test_disjoint(self):
d = Dependencies([('1', None), ('2', None)])
l = list(iter(d))
self.assertEqual(len(l), 2)
self.assertTrue('1' in l)
self.assertTrue('2' in l)
[docs] def test_single_fwd(self):
self._dep_test_fwd(('second', 'first'))
[docs] def test_single_rev(self):
self._dep_test_rev(('second', 'first'))
[docs] def test_chain_fwd(self):
self._dep_test_fwd(('third', 'second'), ('second', 'first'))
[docs] def test_chain_rev(self):
self._dep_test_rev(('third', 'second'), ('second', 'first'))
[docs] def test_diamond_fwd(self):
self._dep_test_fwd(('last', 'mid1'), ('last', 'mid2'),
('mid1', 'first'), ('mid2', 'first'))
[docs] def test_diamond_rev(self):
self._dep_test_rev(('last', 'mid1'), ('last', 'mid2'),
('mid1', 'first'), ('mid2', 'first'))
[docs] def test_complex_fwd(self):
self._dep_test_fwd(('last', 'mid1'), ('last', 'mid2'),
('mid1', 'mid3'), ('mid1', 'first'),
('mid3', 'first'), ('mid2', 'first'))
[docs] def test_complex_rev(self):
self._dep_test_rev(('last', 'mid1'), ('last', 'mid2'),
('mid1', 'mid3'), ('mid1', 'first'),
('mid3', 'first'), ('mid2', 'first'))
[docs] def test_many_edges_fwd(self):
self._dep_test_fwd(('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
('mid1', 'e2'), ('mid1', 'mid3'),
('mid2', 'mid3'),
('mid3', 'e3'))
[docs] def test_many_edges_rev(self):
self._dep_test_rev(('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
('mid1', 'e2'), ('mid1', 'mid3'),
('mid2', 'mid3'),
('mid3', 'e3'))
[docs] def test_dbldiamond_fwd(self):
self._dep_test_fwd(('last', 'a1'), ('last', 'a2'),
('a1', 'b1'), ('a2', 'b1'), ('a2', 'b2'),
('b1', 'first'), ('b2', 'first'))
[docs] def test_dbldiamond_rev(self):
self._dep_test_rev(('last', 'a1'), ('last', 'a2'),
('a1', 'b1'), ('a2', 'b1'), ('a2', 'b2'),
('b1', 'first'), ('b2', 'first'))
[docs] def test_circular_fwd(self):
d = Dependencies([('first', 'second'),
('second', 'third'),
('third', 'first')])
self.assertRaises(CircularDependencyException, list, iter(d))
[docs] def test_circular_rev(self):
d = Dependencies([('first', 'second'),
('second', 'third'),
('third', 'first')])
self.assertRaises(CircularDependencyException, list, reversed(d))
[docs] def test_self_ref(self):
d = Dependencies([('node', 'node')])
self.assertRaises(CircularDependencyException, list, iter(d))
[docs] def test_complex_circular_fwd(self):
d = Dependencies([('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
('mid1', 'e2'), ('mid1', 'mid3'),
('mid2', 'mid3'),
('mid3', 'e3'),
('e3', 'mid1')])
self.assertRaises(CircularDependencyException, list, iter(d))
[docs] def test_complex_circular_rev(self):
d = Dependencies([('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
('mid1', 'e2'), ('mid1', 'mid3'),
('mid2', 'mid3'),
('mid3', 'e3'),
('e3', 'mid1')])
self.assertRaises(CircularDependencyException, list, reversed(d))
[docs] def test_noexist_partial(self):
d = Dependencies([('foo', 'bar')])
get = lambda i: d[i]
self.assertRaises(KeyError, get, 'baz')
[docs] def test_single_partial(self):
d = Dependencies([('last', 'first')])
p = d['last']
l = list(iter(p))
self.assertEqual(len(l), 1)
self.assertEqual(l[0], 'last')
[docs] def test_simple_partial(self):
d = Dependencies([('last', 'middle'), ('middle', 'first')])
p = d['middle']
order = list(iter(p))
self.assertEqual(len(order), 2)
for n in ('last', 'middle'):
self.assertTrue(n in order,
"'%s' not found in dependency order" % n)
self.assertTrue(order.index('last') > order.index('middle'))
[docs] def test_simple_multilevel_partial(self):
d = Dependencies([('last', 'middle'),
('middle', 'target'),
('target', 'first')])
p = d['target']
order = list(iter(p))
self.assertEqual(len(order), 3)
for n in ('last', 'middle', 'target'):
self.assertTrue(n in order,
"'%s' not found in dependency order" % n)
[docs] def test_complex_partial(self):
d = Dependencies([('last', 'e1'), ('last', 'mid1'), ('last', 'mid2'),
('mid1', 'e2'), ('mid1', 'mid3'),
('mid2', 'mid3'),
('mid3', 'e3')])
p = d['mid3']
order = list(iter(p))
self.assertEqual(len(order), 4)
for n in ('last', 'mid1', 'mid2', 'mid3'):
self.assertTrue(n in order,
"'%s' not found in dependency order" % n)